New plugin: AI Image Generator

[nqst]

Initial checklist

• [X] I understand this is a feature request and questions should be posted in the Community Forum
• [X] I searched issues and couldn’t find anything (or linked relevant results below)

Problem

We want to enhance Uppy's functionality by adding AI features. The first candidates are AI image generation and background removal.

Solution

Here are the screenshots of the new AI image generator feature. This includes the updated Image editor (see https://github.com/transloadit/uppy/issues/5407), which looks much lighter, and adds the "Edit with AI" and "Remove background" features.

1. The Dashboard with the new "AI Image Generator" plugin:

2. Form. It's very similar to the form that we currently have in the Unsplash plugin:

3. Result images. The idea is to generate 2 images by default (this amount is configurable) so the user can select their preferred option. The selection logic is similar to what we have in the Instagram plugin — clicking on an image toggles a bar with the Select button.

4. Updated Image Editor. (#5407) It contains the new AI features. The "Edit with AI" button toggles a form (see Screenshot 5 below), while the "Remove bg" is a button which immediately triggers the automatic background removal process.

5. Edit with AI mode active.

These screenshots are likely not final, and the mobile version is not ready yet. Comments and suggestions are welcome!